JetBrains MPS: Why Modern Language Workbenches Matter.- Part I: JetBrains MPS in Industrial Applications.- Use MPS to Unleash the Creativity of Domain Experts: Language Engineering Is a Key Enabler for Bringing Innovation in Industry.- JetBrains MPS as Core DSL Technology for Developing Professional Digital Printers.- A Domain-Specific Language for Payroll Calculations: An Experience Report from DATEV.- FASTEN: An Extensible Platform to Experiment with Rigorous Modeling of Safety-Critical Systems.- Migrating Insurance Calculation Rule Descriptions from Word to MPS.- Part II: JetBrains MPS in Research Projects.- Projecting Textual Languages.- Engineering Gameful Applications with MPS.- Learning Data Analysis with MetaR.- Part III: Teaching and Learning with JetBrains MPS.- Teaching MPS: Experiences from Industry and Academia.- Teaching Language Engineering Using MPS.